<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>

    <script type="text/javascript" src="../js/react.development.js"></script>
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <script type="text/javascript" src="../js/babel.min.js"></script>
    
    <script type="text/babel">
        /*
            不要过度使用ref
            当出现事件发生源与事件触发源相同时，可以省略ref
        */
        class Demo extends React.Component {
            showData = (current)=>{
                console.log(current.target);
            }
            render() {
                return (
                    <div>
                        <input onBlur={this.showData} type="text"/>
                    </div>
                )
            }
        }

        ReactDOM.render(<Demo/>,document.querySelector('#app'))
    </script>
</body>
</html>
